A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5915-01-014-6309
NSN 5990-00-010-8186
NSN 5835-01-112-9008
NSN 5965-01-449-2794
NSN 5996-01-114-0814
NSN 6610-00-614-7943
NSN 6620-01-440-9810
NSN 5910-01-457-2002
NSN 5915-01-513-9122
NSN 6145-01-303-4821
NSN 6645-01-326-7316
NSN 5915-00-404-6729